Check-valve.



No. 629,449. Patented July 25, 899. J. J. LOCKE.

CHECK VALVE.

m: upims PETERS co. Pno'mLrn-u, WASHINGTON. n. l:v

UNITED STATES PATENT QE ICE.

JAMES JOHN LOCKE, OF'OI-IIOKALAH, ARKANSAS, ASSIGNOR OF ONE-HALF TO T.E. \VILSON, OF DARDANELLE, ARKANSAS.

CHECK-VALVE.

SPECIFICATION forming part of Letters Patent No. 629,449, dated July 25,1899.

Application filed April 17, 1899. SerialNo. 713,350. (No model.)

To (bi/Z whom it may concern:

Be it known that I, JAMES JOHN LOGKE, a citizen of the UnitedStates,residin g at Chickalah, in the county of Yell and State'ofArkansas, have invented a certain new and useful Check-Valve, of whichthe following is a specification.

My invention relates generally to checkvalves, and more particularly tothat class of Io check-valves adaptable for use in the feedwater pipesof steam-boilers, the object of the invention being to provide a strong,neat, cheap, reliable, and durable, valve the nse'of which will avoidmany of the accidents and r difficulties encountered in the use ofordinary check-valves.

IVith this object in view my invention consists in the improvedconstruction, arrangement, and combination of parts hereinafter fullydescribed, and afterward specifically pointed out in the claims.

In order to enable others skilled in the art to which my invention mostnearly appertains to make and use the same, I will now proceed todescribe its construction and operation,

having reference to the accompanying drawings, forming part hereof, inwhich Figure l is a vertical sectional view on a plane cuttinglongitudinally through a checkvalve constructed in accordance with myinvention, the valve being closed. Fig. 2 is a transverse verticalsection taken on the plane indicated by the dotted line 2 2 of Fig. 1,looking in the direction of the arrow. Fig. 3 isa 5 similar view to Fig.1, the valve being open and the ends of the case broken away. Fig. 4 isa detail perspective view of the valve removed from the ease.

Like letters of reference mark the same 0 parts wherever they occur inthe various figures of the drawings.

Referring to the drawings by letters, A indicates the casing or frame ofthe valve,which has cylindrical threaded ends B B to receive pipes, acubical central chamber in which the valve works and in one side ofwhich is the valve-seat O, and avertieal extension D of the central boxor chamber, through which the valve can be inserted or removed, saidextension being closed by the screw-cap E.

F indicates the valve, which is made, preferably, of brass or analogousmetal, is rectangular in outline, has a fiat rear face and a convexfront face, and is provided with a series of slots G near its upper edgeto engage over hooks II, and thereby pivotally support the valve with anormal tendency to hang in its closed position.

On the rear flat face of the valve F is a square sheet I of asbestospacking, in position to lie between the valve and its seat when thevalve is closed, such packing being held in place on the valve by aclamp-plate J, secured by screws K, the clamp-plate being of lessdiameter than the opening in the valveseat, so as not to interfere withthe seating of the packing, as clearly shown in Fig. l.

L indicates a stop-pin toprevent the valve from rising too high whenopened by the passage of the water.

The operation of my invention will be readily understood from theforegoing description.' Water will freely pass through the valve fromthe outside, (from the left as indicated in Figs. land 3,) tipping upthe valve to the position shown in Fig. 3 if the flow is sufficientlystrong; but any back flow or pressure will at once close the valve downto position of Fig. 1, and the heavier the back pressure the tighter thevalve will be closed.

The advantages attending the use of my in= vention are numerous. Thewater has a straight passage, without crooks or turns, to increasefriction, and has no dead-weight to raise, as in a lift-valve. Theasbestos packing will not stick and cause trouble in the water- 'thespirit of the invention.

Having thus fully described my invention, too

what I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. In a check-Valve, the combination with the case or bodyhavingacubical chamber and a valve-seat in one side thereof, of hooks arrangedabove the valve-seat, the valve proper provided with slots to pass oversaid hooks, whereby the valve is suspended thereon, and a stop-pin toprevent the valve from rising too high when open, substantially asdescribed.

2. The valve-plate herein described, rectangular in outline, having aflat rear face, a convex front face, and a series of suspending

